F
(t-2)(t+3)
t2-5t+6
(u-4)(u-1)
u2-5u+4
(s-6)(s-3)
s2-9s+18
(y-4)(y-3)
y2-7y+12
(z+4)(z-7)
z2-3z-28
(7-k)(4-k)
28-11k+k2
(y-3)(y+5)
y2+2y-15
(x-1)(x+4)
x2+3x-4
(r+3)(r-5)
r2-2r-15
(x-7)(x+5)
x2-2x-35
(s-3)(s+3)
s2-9
(y+2)2
y2+4y+4
(x-4)(x+4)
x2-16
(a+7)2
a2+14a+49
(x-1)2
x2-2x+1
(2y+3)(y+1)
2y2+5y+3
(3y-1)(y+3)
3y2+8y-3
(n+1)(2n+5)
2n2+7n+5
(7x-1)(x+7)
7x2+48x-7
(2y+1)(3y+2)
6y2+7y+2
(3x-y)(x-2y)
3x2-7xy+2y2
(4h-k)(2h+3k)
8h2+10hk-3k2
(7a-2b)(5a-3b)
35a2-31ab+6b2
(a2+3b)(3a2-b)
3a4+8a2b-3b2
(3x-5y)(4x+y)
12x2-17xy-5y2